Around here, the dealers mechanics are generally busy doing warranty repair.
Such things as oil changes and the like are relegated to the same crew that
washes cars and does such things as incoming inspection and wax jobs. Even
among the mechanics, there is a division or two, such as "heavy mechanical"
(Engine & transmission changes, etc.) "Light mechanical" (Brakes, accessory
replacements, alignments, etc) And in some shops electrical, electronic
(diagnostics,etc.) is even separate. rates? Dealer $85Hr Independent shops
$45-65
Hook a car to an electronic diagnostic machine $80 + Labor minimum 1 Hr.

I darken a dealers doorstep only when:
1. He is the only source for a part
2. Warranty repair

To show why-
Some years ago, my in-laws bought a new caddy in the Chicago area in the
winter. a few weeks later, they drove it to the southeast, where we live.
During the trip, the outside temperature change was from below freezing in
Chicago to balmy 70's with in car temperatures much higher due to the sun.
The headliner was glued and started sagging. Not only that, but the caddy
started running poorly, to the point that it would stall when the A/C kicked
in.

When my father in law and my wife went to the local caddy dealer, the
service manager told them that he would not repair the caddy since they
(obviously) did not buy it there.

What the service manager did not know was that one of the owning partners
was the family lawyer, and his daughters were in my wife's girl scout
troupe.   A phone call solved the problem, with the service manager's skin
color changing several shades lighter after my wife handed him the phone.
Yes, the caddy was finally repaired, and fairly quickly.

I've had dealers service people use the no problem found excuse too many
times. I've also had them make records of service disappear when warranty
issues arose. I've had factory reps disagree, and refuse to authorize
additional repairs needed when the first attempt failed due to "replace the
less expensive part first" practices.

I've had several occasions when a warrenty replacement part had the same
problem as the original. This occurs more often with american made cars than
with the usual japanese car.
When this happens to often the dealers service departmentsd throw up there
hands, rather than actually solving the problem.

There is still too much of the repair it "good enough to make it past the
warrenty" in the dealers repair operations.